Progressive suspension shock 444 fxd hd blk

Features the all new Frequency Sensing Technology (FST) which allows the shocks to sense the frequency of a bump and automatically adjust damping for superior ride quality. Deflective disc valving. Adjust spring pre-load by hand, no special tool needed. Includes a progressive rate spring and is high-pressure gas charged for consistent performance. Standard or heavy duty spring rate with a black or chrome finish. Sold in pairs. NOTE: A shock which is slightly longer than stock may alter the head angle slightly and provide somewhat quicker steering. NOTE: A shock which is slightly shorter than stock may slightly alter the head angle and provide somewhat slower steering. NOTE: For OEM shock lengths, see the Quick Reference Guide in the back of the FatBook. NOTE: Heavy Duty Applications are recommended for bikes that are operated at or near the manufacturer's maximum load rating over 50% of the time.